Not the person you asked the question to but, for me it was dogshit music selection. I dislike radio music, my forte of music is almost exclusivley EDM based. Spotifies selection for glitchstep/dubstep/chillstep was a joke when i was looking into it. Plus I heavily disliked their leaning into requiring an account to even listen.

It sets itself to autostart, and then hid the setting deep on a second screen. Opt-out plus malicious design, for one example, and the algorithm and pay structure for another.